// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_BASE_NINE_IMAGE_PAINTER_FACTORY_H_
#define UI_BASE_NINE_IMAGE_PAINTER_FACTORY_H_

#include "base/memory/scoped_ptr.h"
#include "ui/base/ui_base_export.h"

// A macro to define arrays of IDR constants used with CreateImageGridPainter.
#define IMAGE_GRID(x)                                      \
    {                                                      \
        x##_TOP_LEFT, x##_TOP, x##_TOP_RIGHT,              \
            x##_LEFT, x##_CENTER, x##_RIGHT,               \
            x##_BOTTOM_LEFT, x##_BOTTOM, x##_BOTTOM_RIGHT, \
    }

// Defines an empty image for use in macros for creating an image grid for a
// ring of eight images.
#define EMPTY_IMAGE 0

// A macro to define arrays of IDR constants used with CreateImageGridPainter
// where only a ring of eight images is provided and center image is empty.
#define IMAGE_GRID_NO_CENTER(x)                            \
    {                                                      \
        x##_TOP_LEFT, x##_TOP, x##_TOP_RIGHT,              \
            x##_LEFT, EMPTY_IMAGE, x##_RIGHT,              \
            x##_BOTTOM_LEFT, x##_BOTTOM, x##_BOTTOM_RIGHT, \
    }

// A macro to define arrays of IDR constants used with CreateImageGridPainter
// where it can only be streched horizontally.
#define IMAGE_GRID_HORIZONTAL(x)                   \
    {                                              \
        x##_LEFT, x##_CENTER, x##_RIGHT,           \
            EMPTY_IMAGE, EMPTY_IMAGE, EMPTY_IMAGE, \
            EMPTY_IMAGE, EMPTY_IMAGE, EMPTY_IMAGE  \
    }

// A macro to define arrays of IDR constants used with CreateImageGridPainter
// where it can only be streched vertically.
#define IMAGE_GRID_VERTICAL(x)                    \
    {                                             \
        x##_TOP, EMPTY_IMAGE, EMPTY_IMAGE,        \
            x##_CENTER, EMPTY_IMAGE, EMPTY_IMAGE, \
            x##_BOTTOM, EMPTY_IMAGE, EMPTY_IMAGE  \
    }

namespace gfx {
class NineImagePainter;
}

namespace ui {

// Creates a NineImagePainter from an array of image ids. It's expected the
// array came from the IMAGE_GRID macro.
UI_BASE_EXPORT scoped_ptr<gfx::NineImagePainter> CreateNineImagePainter(
    const int image_ids[]);

} // namespace ui

#endif // UI_BASE_NINE_IMAGE_PAINTER_FACTORY_H_
